Timing mechanism for glass-feeding apparatus



Jan. 3, 1928. 1,654,710

0. M. TUCKER ET AL TIMING MECHANISM FOR GLASS FEEDING APPARATUS FiledNOV. 15, 1924 6 ShGGtS-$h66t '1 O/fl er M W/oer M/lm i Peel/esINVEIYTORS AT ORNEYS.

Jan. 3, 1928.

o. M. TUCKER ET AL TIMING MECHANISM FOR GL ASS FEEDING APPARATUS FiledNov. 15, 1924 6 Sheets-Sheet] 5. r w Z Z W.

IN V EN TORS AT RNEYS.

Jan. 3, 1928. 1,654,710

a. M wcKER ET AL TIMING MECHANISM FQR GLASS FEEDING APPARATUS I V Fileduov.1 5, 1924 s Sheets-Sheet s U/A er M 77/0er' Ill/A5; Peel/e5INVENTORS MRNEYS.

Jan. 3, 1928.

O. M. TUCKER 51'' AL TIMING MECHANISM FOR GLASS FEEDING APPARATUS FiledNov.15, 1924 6 Sheets-Sheet 4 Jan. 3, 1928. 1,654,710

0. M. TUCKER ET AL TIMING MECHANISM FOR GLASS FEEDING APPARATUS FiledNov. 15, 1924 e Sheds-Sheet 5 limil 4 Z aw. ORNEYS.

Jan. 3, 1928. 1,654,710

0. M. TUCKER ET AL TIMING MECHANISM FOR GLASS FEEDING APPARATUS I FiledNov. 15, 1924 6 Sheets-Sheet 6 7 BY fizemys.

IN V EN TOR.

mama. Jul. a, 1928.

j UNITED; STATES 1,654,710 PATENT caries-,5

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ICUTQA CORPORATION 01' DELAWARE.

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Original application fled September 18, 1916, Serial No. 180,488.Divided and this application fled November-15, 1984. Serial No. 750,068.a

Our invention relates'to timing mechanism for glass feeding apparatusand has to do particularly with timing mechanism for automaticallyoperating glass-feeding apparatus which 1s regulable to take care ofpractically all conditions which occur or are likely to occur in thefeeding of molten glass. Still further, our invention relatesparticularly to glass-feeding apparatus for.

separating batches of glass from a molten mass and delivering suchbatches of glass for treatment in compact form free from laps,

folds or' blisters wherein the various operating parts are operable byair under pressure and wherein the provision .of automatic means iscontemplated for regulating the application of such air under ressure tocylinder and piston elements WhlCh control and operate the variouselements of the feeding device.

There are three methods generally used today in the separation ofquantities of molten glass from mass for the making of glass articles.Theseare the gathering of glass by hand on.the end of a punty, the

gathering of glass by suction, and the gathering of glass by flowing itinto a mold or other receptacle wherein it is to be finally treated. Thefirst method has hitherto produced the best grade of finished article.The second method leaves a defect and weakness in the finished'article.The third -method is being rather widely used, although it isparticularly defective in that the very flowing of the glass into a moldor other receptacle inevitably involves a coiling or lapping action ofthe glass stream wherein the exterior chilled skin of the superimposedcoils never merges completely enough to avoid subsequent marks andblisters in the article made from the gathered quantity.

Our invention is a radical departure from any of these methods. It doesnot flow glass into a mold or other receptacle. Therefore,

there is no coiling in the receptacle. It is more closely related to thegatherin of glass by hand in that it separates an livers a compact lumpor gob of glass. It is even superior to the hand method because w thegob delivered is mechanically measured, is gathered by an extrudingaction rather than by the spinning action of a punty, and

is free from tails such as are formed on dey the hand-made gather at thetime of severance from the 'p'unty, being at the same time 5 moreuniform 1n size, shape and weight.

The form of apparatus, as shown by the annexed drawings, which we use toillustrate our invention employs differential area pistons for actuatingthe several movable units 00 or elements ofour feeder. However, it isobvious that our inventionis not limited to such a constructionJbut itsrinci les may be embodied in a great num er 0 varying forms. Inaccordance with the drawlngs, in the structure illustrated, constant airpressure is applied to one area of each piston to maintain theparticularelement in a given position while air pressure is intermittently appliedto a larger area of each piston so as to overcome the constant pressureair and cause the piston to move, that is, constant and intermittentpressures cause actuation of the difi'erent units at the proper time.One object of this invention is'to 7 provide means for efl'ecting theactuation of the difl'ere'nt units at the proper time relative to eachother and to the press or other glass-forming machine in order that thepropersize, weight and shape, lump or gob of glass will be properlydelivered to the press ,or other forming machine without lapping,coiling or folding in the receptacle in which it is received. Theseproper times are determined and controlledby a timing s5 mechanism bypassing the intermittently applied air first through the timingmechanism, from which it' is dellvered at selected intervals to thevarious units or elements of the glass feeder and to the mechanism forstarting the forming machine in motlon.

This application is a divlslon of our pending application, Serial No.120,429, filed September 16, 1916, apparatus for separating quantitiesof molten glass from mass. as

Other and further objects and features of our invention will be apparentas this description progresses and by reference to the accompanyingdrawings 'wherein,--

Figure 1 is an assembly view of our apparatus. p

Figure 2 is a detail looking from the right of Figure 1 and part allybroken away, showing the discharge aperture and the cutting knives. g

Figure 3 is a horizontal long1tudmal section of the spout shown inFigure 1 with the top removed.

Figure 4 is a vertical longitudinal section.

illustrating the structure in Figure 3.

Figure 5 is a horizontal lon 'tudinal section taken on line 5-5- ofFigure 4 illustive position.

Figure 9 is a section taken on line 9-9 of Figure 7 and looking towardsthe right.

-Figure 10 is a detail in vertical section illustrating the knivesseparated and the combustion cup in operative relation to the spoutaperture.

Fi me 11 is a detail in vertical section showlng the knives in operativeposition and the cup in inoperative position.

Figure 12 is a vertical longitudinal section of a special type ofinjector very important in the practice of our invention.

Figure 13 is a rear elevation of this ini or- Figure 14 is a plan viewof the mechanism for controlling the operation of the various parts ofour apparatus through the medium of air pressure, valves andautomatically effective and adjustable mechanism being shown.

Figure 15 is a side elevation of the structure shown in Figure 14.

Figure 16 is a vertical section of one of the valves illustrated inFigures 14 and 15.

Figure 17 is an enlarged detail in plan of one of these valves, showingit in position to receive and deliver compressed air to its cylinder.

Figure 18 is a view similar to Figure 17, only showing the valve inposition to exhaust air from its cylinder to the atmosphere.

Figure 19 is a bottom plan view of the structure shown in Figure 16showing the peculiar type of star wheels which are operated torotate thevalves by a step-by-step action by means of the mechanism illustrated inFigures 14 and 15.

Figure 20 is a section taken on line 20-20 of Figure 15 showing thespecial adjustable mechanism for tripping a valve to synchronize thestarting of the press or other forming machine with the variousoperations of our apparatus.

With particular reference to Figures 1 and 2 of the drawings, our glassfeeding apparatus may comprise'a spout 1 connected to atank (dot shown)and having an aper ture 2 in a. bushing 3.

The bushing 3 is ofa peculiar type havin I important advantages and isalso mounte in a novel manner.- In the first place, it is made in twoparts, and the upper part is permanently ositioned while the lower part18 secured upon a hinged ring (see Figure 4) andis removable therefromso that similar parts of varying size may be applied. Thus there isrovided an enlarged chamber immediately above the delivery orifice ofthe bushing and yet the walls of this delivery orifice are tapered. Theresult is that a comparatively large volume of molten glass is fed tothe'point where this delivery orifice commences and then the centralportion of this volume is discharged through this comparatively shortand tapered orifice. The result is that friction against the Wallsof-the bushing is practically eliminated, for the glass which isactually delivered is taken from the center of a stream of largerdiameter and extruded through an orifice of minimum depth. The formationof the bushing in two parts and the mounting of this bu$h ing on ahinged ring also facilitates chang-, ing of the bushing, since thehinged ring may be swung down and a new bushing placed thereon withlittle difliculty and at a ploint comparatively remote from the hotgass.

Working immediately below the spout and preferably carried thereby is apair of knife arms 4 carrying deflectors 5. These knives are designed tobe successively brought together and separated and they have variousadjustments, to be described. They are mounted to have a practicallyinstantaneous cut and this is particularly important when the diameterof the extruding glass is considered. Mounted and controlled foroperation while the knives are inoperative is a combustion cup 6 whichis automatically effective for a predetermined period of time after eachcutting action, this period of time being variable at will by theadjustment of timing mechanism to be described. The knivesare'controlled by a piston and cylinder mechanism designated 7 Thecombustion cup is given vertical movement by the vertical piston andcylinder construction 8 and is given horizontal movement; by thehorizontal piston and cylinder construction 9. The combustion cup is fedwith a combustible mixture by an injector 10 and the effect of thecompressed air used for the different cylinders and for the injector iscontrolled by a timing mechanism 11.

The knife structure is illustrated best in Figures 2, 7, 8 and 9 andcomprises blades carried upon arms 4. which are pivoted at 13 and whichare provided with perforated ears to which are attached operating links14 conshow that the knife is swiveled as at 17 while its opposite endmay be swung horizontally under the restraint of set screws 18 and '19.This adjustment is important for several reasons.

One reason is that it is desirable that the severed portion fall andalight upon its base as well as in a centered position upon its treatingsurface. A slight adjustment of these knives sidewise will tend toensure this result if the fall has hitherto been defective. Thisadjustment has an increased effectiveness because of the deflectors 5.

In the section taken on line 9-9 (Fig. 7), it appears that the support20 for the knives per se has bolt and slot connection at 21 whereby theknives may be bodily tilted from the horizontal. This is a verydesirable construction. The cutting blades are necessary in diflerenthorizontal planes. The result is that there is a tendency to bat. theglass side- 'wise and that the severance of the glass produces an unevenout upon the bath which is then deposited but particularly upouthe lowerend of that portion of the'glass which is still'connected to the mass.The disposition of these knives in tilted position has several results.In the first place, it neutralizes this .tendency of the knives to batthe glass sidewise. In the second place. it

) reduces the irregularity of the cut surface of the glass stillappended to the mass.

A vertical adjustment of the free endof this knife structure about itsswivel maybe effected by one or more set screws 22. There are manyimportant advantages to this adjustment chiefly relating-to themaintenance of proper form for the extruding glass under differentconditions such as varying viscosities et cetera.

The combustion cup is best illustrated in Figures 5 and 6, 10 and 11 andhas been designated 6. It comprises a cup with a perforated false bottom23 and with an inlet 24 in the chamber beneath the false bottom for theintroduction of the. comlmstible This inlet is preferably tangentiallydisposed. so that the gaseous mixture delivered to the chan'iber beneaththe false bottom has a swirling action in its delivery to theperforations of this false bottom. The cup is desirably controlled byair under pressure and is capable of various movements. After eachoperation of the cutting knives, this cup swings into position beneaththe feed aperture of the spout and then moves upwardly into desire-drelation to the glass in or depending from the spout.

' pressure.

The cdmbustion cup is connected to a source of supply of .a fluid underpressure, preferablya combustible mixture, in such a manner t 'at acertain uantity of the mixture is alwaysbeing fer? thereto. cup alwayscontains a flame, although in the periods of inaction this flame issimply in the nature of a' pilot light. The controlling apparatus issuch that, in s chronism with the movement of the com ustion cuoperative position, a great increase ln'the combustible mixture fedthereto takes place. Furthermore, the mixture fed during the period ofaction is fed under'a maintained Y done and we have accomplished it bythe use of a novel and peculiar form of injector,

to be described. The position of the combustion cup is regulable by theadjustable sto an the pressure .of the mixture within the cup is alsoregulable. The actions of both the cup and the pressure therein may bevaried to attain unusual results. This variability or regulability ofthe cup and of the pressure therein may be eflected independently ortogether. In other words, theposition of the cup may be varied to varythe pressure upon the glass, the pressure of the mixture may be variedto vary the pressure upon the glass, or both the position of the cup andthe pressure of the mixture may be varied to attain this result. Thevariations in the position of the cup must necessarily be within a Veryslight range if combustion and pressure are to be maintained.Nevertheless, the cup is variable within this range and these variationsare extremely important in the effect produced upon the glass.

One method of using the combustion cup is to swing itinto such aposition and with the mixture at such a pressure that the glassextruding from the feed aperture of the spout is balanced and halted inits movement. Another method is to swing it into such a position andwith the mixture at such a pressure that the normal movement of themolten glass in the spout is reversed and this glass driven up into thespout. A third method is to swing the combustion cup into position belowthe aperture and then cause the cup to recede as the glass advances,with the flame of the cup playing upon this glass. A fourth method is tohold the combustion cup in position until the free end of the extrudingglass almost touches the base: of the cup and then to gradually lowerthe cup. retarding the extrusion of the glass and in some measureinfluencing its form b v' the impact of the blast. the glass is beingsubjected to an extremely intense heat with the result that such marksas were made by the shears are entirely removed and detrimental chillingof the extruding glass is obviated. It is obvious that In all of theseforms, 1

Thus, the 7o into .75

It is very important that this be 25 in the top of the vertical cylinder8 I this combustion cup in operation under the control of its operatingand the timin mechanism not only times the movement 0 the extrudingglass so as to roperly time its delivery tothe approaching mold. Itperforms a more vital function, since it is this rate of movement of theglass and the time it is in motion that determines the weight of thebatch or gob of glass to be delivered, as long as the regularity ofaction of the cutting knives and the size of the aperture is unchanged."Special attention is directed to this fact that we, by using a feedaperture of suflicient and unvarying size for ware of a given range ofweight and size are enabled to secure a compact batch or gob of .glasswhose weight is mainly regulated by the rate Of extrusion of the glassand the time of extrusion from the withdrawal of the cup to eachsucceeding cutting action.

Very peculiar results are attained from the different uses, of thiscombustion cup. For instance, when the cup is used with sufficientpressure and the glass is comparatively fluid it is forced up into thespout, with the result that during its return it "gathers impetus andextrudes a batch of greater diameter than it would otherwise have andwith less tendency to string out in the early stages of extrusion. Thisis extremely desirable in varying the form of the batch or gob to besevered. On the other hand. there are certain conditions. as when theglass is more viscous, when it is more dsirable to simply counterbalancethe glass. It is difficult to enumerate all of the possible variationsin the use of this combustion cup but experience has demonstrated thatit is efi'ective to meet practically all the varying conditions to bemet with in the separation automatically of batches of glass from amolten mass.

The injector is shown in Figures 12 and 13 as comprising a casing 26having a,discharge pipe 27 and a Venturi tube 28 contained therein.Disposed directly in front of the inlet of this tube is a iet 29 havingports 30 therein in communication with a chamber 31. This chamber 31 isdesigned to be fed with air under pressure through a pipe tap 32 whenthe combustion cup is in stationary inoperative position and thropgh aport 33 from the moment this cup starts to move toward operativeposition until it returns to its stationary inoperative position.Likewise, the discharge orifice of. the. jet 29 is disposed in a chamber34' and this chamber 34 is fed with gas. due to the velocity of the airthrough the Venturi tube, producing a suction through the pipe tap 35when the cup is in stationary inoperative position and tion cup.

trolled by the piston valve 37, which is mov communication with the port33 is governed by valve 41. The gas supply port is indicated at '42 andis likewise under the control of a valve 43. The gas port 36 may beprovided with a check valve 44 which opens under suction produced by thepassage of compressed air from the jet 29 through the Venturitube butwhich automatically closes in the event that this air passage throughthe said tube is choked off. I

A feature of vital importance in our improvement has to do with anauxiliary check valve made a part of this injector. It is obvious thatthe air and gas mixture is forced into the combustion cup from theoutlet 27 through a flexible pipe 45 under pressure even when the cup isin stationary position. At or about the instant the cup starts to movetowards operative position, the piston valve of the injector is operatedby mechanism provided for greatly increasing this pressure. It isobvious, however, that the volume of gas is determined in some measureby the vacuum caused by the air jetted through the Venturi tube. It islikewise obvious that this vacuum will vary in degrees, dependentprimarily upon the de-' .but the gas drawn in must be substantiallyuniform in volume. This variation of condition is due primarily to thedifferent positions under-which the cup operates and it may be due toother things. Whatever the causes are, however, we, have found itextremely important to success that some means he provided to maintain asubstantially uniform vacuum so that there will be a substantiallyuniform volume of gas forced into the combustion cupwith the air.

Our apparatus for accomplishing this result has taken the form of acheck valve 46 which is definitely weighted and covers an opening of adefinite size so that any increase of the vacuum in the chamber 34 abovea predetermined'degree will raise this check.

valve and draw in sufiicient air to reduce the vacuum. The injector isconstructed capable of creating a vacuum higher than is desirable andthis auxiliary valve is used to set a-limit to the degree of vacuumactually used and consequently to insure a uniform volume of gas beingforced into the combus- The cylinders and pistons used in our inventionare of the ty illustrated in our application, Serial No. 97,067, filedOctober 24, 1913. The peculiarity in construction appears in Figures 6,7, 8, 10 and 11. It arises from the fact that air is admissible to bothsides of the piston head and that one side of this piston head is ofgreater area than the other side. Constant pressure air is maintainedagainst that side of the piston head having the smallest exposed area.'I h1s maintains the piston in normal osition. Then the pistons areoperated by t e automatic introduction of air 1pressure, to the sides ofthe piston which ave the largest area, under control of the timingmechanism to be described. 7

The pipin for conducting the a1 r under ressure to tile cylinder and thein ector is lllustrated best in Figure 1 of the drawin s.

- Referring to Figure 1 of the drawings, t e constant pressure air issupplied throu h main pipe 47. It is dlrected to the cylm er whosepiston moves the combustion cu vertically by branch pipe 48, to the cymder whose piston moves the combustion cup horizonta-lly b branch pipe49 to the operatm chamber or the injector valve by branc pipe 50, and tothe cylinder whose p1ston operates the cutting knives by branch pipe 51.'.The os-itive actuation of the piston for causing the lowering of thecombustion cup is effected by the introduction of air throu the pipe 52;the positive operation of t e piston for swingingthe cup horizontallyinto operative position is effected by the introduction of airthroughthe plpe 53; the movement of the valve of the injector intooperative position is effected by the introduction of air through thepipe 54," and the knives are brou ht together by introducing air through51% pipe. 55. The gas supply pipe is indlcated at 99.

The timing mechanism for controlling the valveswhich admit air to thepipes 52, 53, 54 and 55 is illustrated in Figures 1 and 14 to 19. Inthese figures it will be noted that the air is fed from left to rightthrough the piping 56 and thence through branch pi s 57 by rotaryvalves. Each rotary valve as two arcuate ports so that its movement insuccessive quarter-turns successlvel connects a branch 57 with a pipethat elivers to a cylinder and then with an exhaust 59. (See Figures 17and 18 for successive position of a valve.)

These rotary val es carry upon their bases star wheels 60 with points 61yieldable one way, whereby such valves may be given quarter-turnssuccessively by pins which may be collectively designated 62 carriedupon a series of disks. The operations of these disks vary to someextent as follows:

The knife operating disk may be desig-- nated 63. It is'ri idly mountedupon the driven shaft 65 an carries a couple of pins gives the starwheel and its valve a quarter 5- turn and thus brings it into positionto admit operating air to the cylinder 7, which results in bringing theknife arms together tosever *1; the glass. Immediately, the other pingives the star wheel and its valve another quarterturn and brings itinto position to exhaust air from the cylinder 7, with theresult thatthe knife arms are separated. Thecomplete. action of the knife arms ispractically in-,

stantaneous and this is extremely desirable in view of the volumes ofglass being severed and the intense heat which is otherwise liable toinjure the knife blades.

The disk 64 is shown in detail inFigure 20 and is a rigidly mounted diskutilized to trip 'the valve which sets in motion the press to bedisposed beneath and fed by our apparatus. This disk is shown ascomprising a series of openings or sockets adjacent to periphery for theadjustable reception of a tripping lug"66. This tripping lug 66automatically trips a valve 67 which sets the press in operation. Thusthe starting of the press may be timed with. the various opera tions ofour apparatus.

The remainin disks 68 are arran edin pairs, the secon from the left ofeac .pair being loosel mounted upon the shaft 65 while the ot erisrigidly mounted thereon. Each disk carries an inwardly'extending pin 62and the two insof each pair are mount-:

ed to successive y actuate one valve through the medium of its starwheel. The period between these actuations is determined by the time inwhich one pin of a pair follows after the other to actuate the starwheel. It is for this reason that one disk of each pair is looselymounted, as it is adjustable in and their pins which operate the valve101 and 102 are adjustable under the control of a single operating screw71. The first pair of these disks controls the inlet of operating air tothe injector and horizontal cylinder simultaneously. The second pair ofthese disks controls the rapid up and down movement of the piston in thevertical cylinder 8. It is extremely desirable that all of theseelements have theiradjustments efi in lessening the weight of the glassin the severed batch or lump, while the lowering of this member resultsin increasing this weight. The last pair of disks in Figure are designedto operate the valve 103 so as to govern and roduce a slow recedingaction of the com ustion cup after it has once assumed operativeposition. The period of time of this receding action can be regulated byscrew rod 77 in a manner similar to the regulation by the screw rod 71.

- t has been made apparent that valve 100 automatically controls theintroduction and the exhaust of operating air to and from the knifecylinder. It has further been made apparent that valve 101 automaticallycontrols the introduction of operatin air to and its exhaust from thevalve of t e. injector and the horizontal cylinder which moves thecombustion cup horizontally. It has been e lained that the increase'offeed of the com ustible mixture to the combustion cup and the initiationof the horizontal movement takes place simultaneously:

- Valves 102 and 103 are designed to co-opa crate, under certainconditions in the control of the vertical movement of the combus tion cuThis cup is designed to be automatical raised by the constant pressureair when it as been moved into proper position beneath the spoutaperture. It is also moved horizontally to this proper position by theconstant pressure air. When it is'desired to move the combustion cupvertically downward with considerable ra idity, the timin' mechanism isso set that 51s valve 102 wi be automatically operated to introduceoerating air to the vertical cylinder controlling this combustion cup.After this has happened, the timing mechanism will operate the valve 101to introduce operating air to the horizontal cylinder and thus move thecombustion cup horizontally to stationary inoperative osition.

It may e desired to lower the cup slowlv to retard the extrusion of theglass. If this is done, the final movement of the cup must be rapid soas to clear the glass before the horizontal movement of the on takesplace. We accomplish this by providmg for a cooperative relation betweenthe valves 102 and 103. A branch pipe 73 leads from the valve 103 to thepipe 52. The introduction of air to the valve 103 may be throttled by a,

needle valve,74. Then the automatic actuation of the valve 103 willserve to admit operating air to the branch 7 3 and then by way of thepipe 52 to the vertical cylinder 8 owin to the eifect of the valve 74.However, thls'air will only be sufiicient to force the piston of thiscylinder 8 downward at a slow speed. At a given point, however, thevalve 102 automatically opens to deliver a full charge of air throu hthe pi e 52 to the vertical cylinder 8. Ti ering of the combustion cupand this is followed, as usual, byroperation of the horizontal cylinderto move the cup horizontally to stationa inoperative position. Thisrapid dro of t e combustion cup after its slow recession before theextrudin glass is necessary to insure a clearance o the glass beforehorizontal movement takes place. The knives may be rendered inoperativeby operation of the three-way valve 75 and the combustion cup may berendered inoperative bg operation of the three-way valve 76. ee Figure1.)

The driven shaft is preferably propelled in the direction indicated bythe arrow in Figure 20 by a motor operating through a worm and worm gearas shown in Figures 14 and 15. The knife blades may be cooled by airblasts as at 78.

In operation, the molten lass flows from the tank into the spout to t efeed aperture thereof. By the weight of the glass in the spout, a ortionof this glass s extruded through t e feed aperture and for apredetermined' period of time. Then the knives are automatically broughttogether, serving to sever a ortion of the extruded glass and direct itseposit into the treating receptacle in such a manner that it will alightproperly.

Then, the combustion cu'p starts to move and simultaneously the pressureof the combustible mixture therein is greatly increased, showing a muchincreased flame. This combustion cup moves horizontally in an arc untilit assumes position'beneath the feed aperture, the horizontal movementbeing effected by the horizontal piston and cylinder described. When itis beneath the feed aperture, it automatically moves upwardly until, innormal usage, it nearl abuts the bottom of the spout, embracin the glassin and de pending from the fee aperture. The glass in this aperture maybe counterbalanced, given a reverse movement, or it may be permitted tohave a retarded descent. After a predetermined proper interval, the cupis automatically dropped and swung horizontally out of position. Thenafter a further predetermined interval, the knives are rought togetherto sever a portion of the glass that has extruded. This completes thecycle of operation. Attention has already been called to the fact thatthe timing mechanism for the movements of the knives and the combustioncup also times the starting of the press.

It is important to note that our apparatus provides for interchangeablebushings so that various sizes of bushings may, be provided fordifierent ran es in weight, sha and size of the articles eing made. At te same time our apparatus is such that adjustere resu ts .a rapid low- Iand the other cam plate bein loosely mountedthereon, apinion intermesingwith gears on said cam plates, whereby the driving of one cam platecauses driving v ofthe other, and means for moving said pinion to a-d]l1Sl} the position of the cams on said plates with relation to eachother.

2. Timing mechanism for glassfeeding apparatus comprising valve mechamsmfor controlling the introduction and exhaust of fluid to the operatingunits of the glass feeding mechanism, a plurality of cam plates providedwith apertures determinately spaced around the edges thereof and camelements designed to removably fit in any one of said apertures.

3. In pneumatic timing mechanism for glass feeding apparatus, aplurality of valves, a rotary cam for actuating each valve, commondriving means for rotating the cams to actuate the valves, intermediategearing.

between the said driving means and one of i said cams, and manuallyoperable means for adjusting said gearing to change the angular postionof one cam relative to another and thereby to change the relative .timeof actuation of the corresponding valves.

43 In pneumatic timing mechanism for glass feeding apparatus, aplurality of valves, a rotary cam for actuating each.

valve, common driving means for rotating the cams to actuate the valves,intermediate gearing between the said driving means and one of saidcams, and means operable manu ally while said cams are rotating for adusting said gearing to change the angular posi-,

tion of one cam relative to another and thereby to change the relativetime of actu-' ation of the corresponding valves.

5. In pneumatic timing mechanism for glass feeding apparatus, aplurality of valves, a rotary cam for actuating each valve, a rotarydriving member extending axially through said cams and arranged torotate the cams to actuate the valves, intermediate gearing between thesaid driving means-and one of said cams, andmeans, operable manuallywhile said cams are rotating, for adjusting said gearing to change theangular position of one cam relative to.

another and thereby to change the relative time of actuation of. thecorresponding valves.

6. In timing mechanism for glass-feeding apparatus having a pluralit ofmovable units, a plurality of valves or controllingthe movements of theunits, a rotatable shaft carrying a plurality of cams, said cams beingarranged in pairs, each air beingv adapted to positively 0 en and c oseone of said valves, the cams 0 each pair being relatively adjustableabout their axis of rotation to vary the period between the opening andclosing of said valves.

. In timing mechanism for glass-feeding apparatus having a plurality ofmovableunits, a pluralit of valves for controlling the movement 0 theunits, a rotatable shaft carrying a plurality of cams, said cams beingarranged in pairs, each pair being adapted to positively open and closeone of said valves, and means for relatively adjusting one of the camsin each pair about its axis of rotation while said cams are rotating tovary the period between opening and closing of said valves.

8. Intiming mechanism for glass-feeding apparatus, a valve, a rotatableshaft, a cam' rotated by the shaft for positively opening the valve,another cam. rotated by the same shaft for positively iclosing'said'valve, one of said cams being shiftable about its axis of rotation'to vary the period between the opening and closing of the valve.

' 9. In timing mechanism for glass-feeding apparatus, a valve, arotatable shaft, a cam,

rotated by the shaft for positively opening thevalve,' another camrotated by the same' shaft for positively closing said valve, and

means, operable manually while said cams are rotating, for adjusting oneof said'cams. rotatively around its axis of rotation to vary the periodbetween the opening and closing of the valve. I

10. In timing mechanism for glass-feedingapparatus, a valve, arotatable. shaft, 'a

cam rotated by said shaft for positively moving said valve to applyfluid, another cam rotated by the same shaft for positively moving saidvalve to exhaust said fluid,

the relative angular position of said cams being adJustable to maintainthe period between successive movements of sald valve upon a change inspeed of rotation of said relative angular position of said cams beingadjustable to change the eriod between successive movements of sa1d.valve with constant speed of rotation of said shaft.

12. In a timing device for a glass feeder,

- other.

13. In a timing device for a glass feeder, the combination with a sourceof constant fluid ressure and a valve for transmitting said uid pressureto said feeder, of a rotary actuating member for opening sa1d valve,another rotary actuating member for closing said valve, and means,operable while said actuating members are rotating, for changing theangular POSltlOD of the valve-o ening member independently of the valve0 osing member.

14. In a timing device for a glass feeder, the combination with a sourceof constant fluid ressure and a valve for transmitting said uid pressureto said feeder, of a rotary actuating member for postlve ly opening saidvalve, another rotary actuating member for positively closing saidvalve, a shaft carrying said actuating members, and gearing, manuallyoperable while the sa1d actuating members are rotating, for chang1ng theangular relation of one of sa1d actuating members with respect toanother.

15. Timing mechanism for glass-feeding apparatus comprising a valvemechanism for controlling the application and exhaust of fluid to thedriving units of the glassfeeding apparatus, a rotatable shaft, a pairof cam plates rotated by said shaft, sa1d cam plates being sointerlocked as to move s1mul taneously and positively open and close thevalve, cam elements carried by sa1d cam plates for contacting with saidvalve mechanism to apply and exhaust said fluid, and

means for adjusting the position of said cam elementsrelative to eachother to vary the period between application and exhaust.

16. Timing mechanlsm for glass-feeding apparatus comprising a valvemechanlsm for controlling the application and exhaust of fluid to thedriving units of the glass-feeding apparatus, a rotatable shaft, a pairof cam plates rotated by said shaft, sa1d cam plates being sointerlocked as to move simultaneously and positively open and ,close thevalve, cam elements carried by said cam plates for contacting with saidvalve mechanism to apply and exhaust said fluid and means for adjustingthe position of said cam plates relative to each other to vary theposition of said cam elements relative to each other to vary the periodbetween application and exhaust.

the glass-feeding apparatus is in operation to vary exhaust. 18; Timingmechanism for glass feeding apparatus comprising a plurality of valvesthe period between application and for controlling the application andexhaust of fluid to a plurality of movable elements of the glass-feedingapparatus, each of said valves having an exposed contacting surface, arotatable shaft carrying a plurality of cooperative cams geared thereto,each. cam

having a portion which contacts-with the exposed surface of itsrespective valve at some point during each cam revolution, and means forvarying the position of said camcontacting portions relative to eachother vto vary the time of contact with the exposed surface of saidvalves to vary the time betweenapplication and exhaust.

19. Timing mechanism for glass-feeding apparatus comprising a pluralityof valves for controlling the application and exhaust of fluid to aplurality of movable elements of the glass-feeding apparatus, each of.said valves having an exposed contacting surface, a rotatable shaftcarrying a plurality of cooperative cams geared thereto, each cam havinga portion which contacts with the exposed surface of its respectivevalve at some point during each cam revolution, and means for varyingthe time of contact of one cam relative to the time of contact of itscooperating cam to vary the period between application and exhaust.

20. Timing ,mechanism' for glass-feeding apparatus comprising a valve.for controlling the application and exhaust of fluid to a glass-feedingunit and having a plurality of operating arms operatively connectedtherewith, a rotatable shaft, a pair of discs rotated by said shaft, avalve contacting member. on each of said discs, the member on one disccontacting with one of said valve 21. Timing mechanism for glass-feedingapparatus comprising a valve for controlling the application and exhaustof fluid to a glass-feeding unit and having a plurality of operatingarms operatively connected therewith, a rotatable shaft, a pair of discsrotated by said shaft, a valve contacting member on each of said discs,the member on one disc contacting with one of said valve arms to movesaid valve to apply said fluid and the member on the other disccontacting with another of said valve arms to move said valve to exhaustsaid fluid, and means for varying the position of said discs relative toeach other to vary the position of said members to vary the periodbetween application and exhaust.

22. Timing mechanism for glass-feeding apparatusxcomprising a valve forcontrolling the application and exhaust of fluid to a glass-feeding unitand having a plurality of operating arms operatively connectedtherewith, a rotatable shaft, a pair of discs rotated by said shaft, avalve contacting member von each of said discs, the member on one disccontacting with one of said valve arms to move said valve to apply saidfluid and the member on the other disc contact-ing with another of saidvalve arms to move said valve to exhaust said fluid, and means forvarying the position of said discs during operation relative to eachother to vary the position of said members to vary the period betweenapplication and exhaust.

23. Timing mechanism for glass-feeding apparatus comprising a valve forcontrolling the application and exhaust of fluid to a glass-feeding unitand having a plurality of operating arms operatively connectedtherewith, a rotatable shaft, a pair of discs rotated by said shaft, avalve contacting member on each of said discs, the member on one disccontacting with one of said valve arms to move said valve to oneposition and the member on the other disc contacting with another ofsaid valve arms to move said valve to another position, and means forrotatin one of said discs concentrically with said shaft duringoperation to vary the position of said members relative to each other tovary the period between opening and closing of said valve.

24. In timer structure for glass-feeding apparatus having a plurality offluid-pressure cylinders for im arting various movements thereto, aplura ity of valves for controlling the application of fluid to and itsexhaust from said cylinders, a single rotatable member carrying aplurality of cams for openin and closing said valves to apply and exaust said fluid, and means for moving said cams concentrically relativetosure cylinders for impartin ing said cams concentrically relative tosaidv rotatable member during operation to vary the period betweenapplication and exhaust.

26. In timer structure for glass-feeding apparatus having a plurality offluid-pressure cylinders for imparting various move ments thereto, aplurality of valves for controlling the application of fluid to and itsexhaust from said cylinders, an actuator for each valve, a singlerotatable member carrying a plurality of cams, said cams being arrangedto cooperate in pairs, one cam moving the actuator to open the valve toapply said fluid and the other cam operating the actuator to close said.valve to exhaust said fluid, and means for moving one of said camsrelative to the other to vary the period between application andexhaust.

27. In timer structure for glass-feeding apparatus having a plurality offluid-pressure cylinders for imparting various movements, thereto, aplurality of valves for controlling the application of fluid to and itsexhaust from said cylinders, a single rotatable member carrying aplurality of cams, said cams being arranged to cooperate in pairs, onecam positively moving its valve to apply said fluid and the other campositively operating said valve to exhaust said fluid, and means formoving one of said cams relative to the other while said cams arerotating to vary the period between application and exhaust.

28. In timer structure for glass-feeding apparatus having a plurality offluid-pressure cylinders for imparting various movements thereto, aplurality of valves for controlling the application and exhaust of fluidto said cylinders, an actuator for each valve, a rotatable shaftcarrying a plurality of cams, said cams being separately mounted andarranged in pairs to operate an actuator to positively open and closeeach of said valves to apply and exhaust said fluid, said cams beingadjustable concentrically of said signatures.

OLIVER M. TUCKER.

WILLIAM A. REEVES.

